Hacksaw-machine.



` R. C. BERRY.

HACKSAW MACHINE. APPLICATION FILED oc. 5. |911. RENEWED Nov. a. 19:4.

Patented May 11, 1915.

2 SHEETS-SHEET l.

n. c. BERRY. HACKSAW MACHINE. APPLICATION FILED OCT. 5 |911. 11392f'7nRENEWED NOV. 3,1914.

Patented May11, 1915.

2 SHEETS-SHEET 2.

@mi/humo@ represent the bed of the machine, B the main f UNITED STATESPATENT N ROBERT C. BERRY, OE INDIANAPOLIS, INDIANA.

naamw-Macaira.

Specication of Letters latent.

Application led October 5, 1911, Serial No. 652,977. Renewed November 3,1914. Serial No. 870,171.

To all 'whom it may concern: l

Be it known that I, ROBERT C. BERRY', a citizen of the United States,residing at Indianapols, in the county of Marion and State of Indiana,have invented certain new and useful Improvements in Hacksaw-Ma'-chincs, of which the following is a speelfication.

My-said invention consists in various improvements in the details ofconstruction and arrangement of parts of hack-saw machines, whereby sucha machine is provided in which the stroke of the saw is automaticallyregulated by the size of the work and its cutting stroke will always beat a downward angle across the work, also, whereby the saw isautomatically raised free from the work 'on its return or non-cuttingstroke, the driving gear automatically disengaged at the completion ofthe work, and other advantages in operation secured, all as will behereinafter more fully described and claimed.

Referring. to the accompanying drawings, which are made a part hereof,and on which similar reference characters indicate similar parts, Figure1 is a top or plan view/of a hack-saw machine embodying mysaidimprovements, Fig. 2 a `front elevation of the same, Fig. 3 an end viewas seen when looking in the direction indicated by the arrows from thedotted line 3-3 in Fig. 2, Fig. 4 a

detailed section on the dotted line 4-4 in Fig. 1, and Figs. 5, 6, 7, 8,9, 10, 11 and 12 detail views illustrating various parts of the machinemore clearly.

In said drawings the portions marked A driving shaft, and C the hack-sawframe.

The bed A is mounted upon legs a. and is A or may be of any appropriatesize and construction for supporting various parts of the mechanism.

The main driving shaft B is mounted in bearings in an upright housing Aon one end of the machine. 1t is provided with a pulley B mounted to runloosely thereon and adapted to be coupled thereto through the medium ofan ordinary, or any approved, form of clutch, as will be presentlydescribed.

The hack-saw frame C is mounted to reciprocate on a bar 10 which isrigidly secured to an arm 11 pivoted on the top of housing A. brace 80carrying a sliding weight 81 is also mounted on the pivot and connectedto lthe outer end of bar 10.

ries an anti-friction wheel 19, and a spring 20 normally supports saidouter end with the wheel 19 in contact with a cam wheel 21 on main shaftB. Saidl rod 12 'extends through the frame 13 between transverse jawsconsisting of pins 22 and 2,3 and a spring 24 in the side of said frame13 forces rod 12 against the opposite side'and normally supports frame13 against its own weight. The

pins 22 and 23 are arranged in dierent hori-` zontal planes and adistance apart just suicient to permit rod 12 to slide freely betweenthem when frame 13 is in a horizontal position. .A pair of uprights 25and 26 are mounted on frame 13 on each side of rod 12, the upright 26having a stop point 27 in its inner face and the upright 25 having aspring- 28 adapted to bear against the opposite edge of rod 12 land,normally hold'it in contact with said stoppoint.

The hack-saw frame C is connected by a pitman 30 to the upper end of apivoted link 31 by4 a pivot 60. Said link 31 is mounted at its lower endon a pivotA 32 in the lower end of. a bracket A33 depending from the bedof the machine. Said link is formed slotted and a sliding block, orhead, 34 is mounted in the slot therein. A second slotted link 35 ismounted at its lower end on a pivot 36 carried bysaid block 34 and itsupper end is connected by a pivot 37 to an intermediate point of acurved (or triangular) pivot carrier 38." Said pivot carrier 38 isconnected at its upper end by pivot 39 with the upper end of housing Aand its lower end is connected by a pivotv 40 with a con-l necting rod41, which is connected at its'y opposite end by a pivot 43 to theadjacent work-holding jaw 44, or otherwise to be positioned by the sizeof the work. Wheel, 21 is provided with a crank pin 45 which engages thesliding block 46 in the slot of. link 35. Jaw 44 and the coperating jaw57 are crank 59 for manipulating said jaws. Said jaws thus constitute awork-holding v1se.

An adjustable trip 47 1s mounted by means of a set-screw 48 in a socket49 on pitman 30. A rock-shaft 50 is mounted 1n bearings on anappropriate part of the frame and carries a/radial projection 5 1rigidly secured thereto. A strike 52 is loosely mounted on said rockshaft alongside of said projection, adapted to turn freely in' onedirection but contact with a horizontal part on'said radial projectlon,when brought to a vertical position in the other direction. A weight 53on its opposite side normally holds said strike 52 in a verticalposition and in contact with projection 51. Rock-shaft 5() carries onits `opposite end a crank or cam 54 upon which the forward end of a rod55 rests. Said rod operates a clutch throwing arm 56 which is adapted tooperate the clutch to couple driving pulley B to shaft B and release ittherefrom. y

From the foregoing description the operation will be seen to be asfollows: The clutch being in engagement with pulley B, shaft B .willoperate and through the connection between the crank pin 45 on wheel 21with the sliding block 46 in link 35 will operate to vibrate said linkon its pivot 37. The connection of the lower end of said link 35 withthe sliding block 34 in link 31 will also operate to vibrate said link31 on its pivot 32. The connection between the upper end of link 31 andthe hack-saw frame C through the medium of pitman 30 will operate toreciprocate said hack-saw frame on bar 10 and operate the saw c upon thework held between the work-holding ja vs 44 and 57. As will be observed,particularly by an inspection 4of Fig. 12, wheel 21 is eccen-` tricallymounted on shaft B. The parts are so arranged relative to each otherthat during the cutting stroke of the hack-saw frame wheel 19 runs uponthe face of wheel 21 on the side of the wheel nearest its axis so thatframe 13 is held in a horizontal position and rod 12 permitted to slidedownward between the pins 22 and 23 and over point 27 asthe saw cutsinto the work. Immediately upon the crank pin 45 passing over the centerand saw frame C thus being started on its return, or non-cutting,movement, the wide side of wheel 21 comes into operation against wheel19 and forces the outer end of lever 16 downward, lifting the outer endof frame 13 upward, so that pins 22 and 23 impinge 'against the oppositeedges of rod 12 and lift said rod upward carrying with it the outer endof arm 11 and the bar 10 on which the hack-'saw frame slides, thuslifting the saw free from the work and holding it out of Contact withsaid work during the 'non-cutting stroke. When said wheel 21 reaches thepoint in its revolution where the saw starts on its cutting movement itsnarrow side is again in contact with wheel 19, which permits the lever16, under the force of spring 20, to return to a horizontal position,also returning frame 13 to a horizontal position and thus adjusting thepins 22 and 23 to allow rod 12 to slide freely and the saw to feed intothe work under the weight of the frame and pivoted bar, as is usual. Theoperation continues until the cut in the work reaches the point desired,which is' determined by the previous adjustment of' trip 47. On thefinishing stroke of the saw said trip contacts with the strike 52 androcks the shaft 50, which, through the crank 54 and rod 55, operates theclutch lever 56 and disengages the clutch from pulley B and stops themachine.

By the arrangement described it will be noted that the pitman 30 isalways operated from the pivot 60 at the upper end of link 31, whichoperates in a tixed arc of a circle on axis 32 and below the line of thework and thus draws said saw into the work on an angle, or down stroke,at each cutting stroke of the saw. Immediately upon the saw starting toreturn, the mechanism before described lifts said saw and permits it toreturn free from contact with the work, thus avoiding the injury to thesaw commonly resulting from dragging it back with its teeth resting uponsaid work. The adjustment of the holding jaws, through the medium of thescrew shaft 58 and crank 59,

operates, through the connecting rod 41 to turn the pivot carrier 38 onits pivot 39 and throw the pivot point 37 either up or down according tothe size of the work clamped between said jaws. As the pivot point 37 isthrown up, or down, the distance between said pivot and the crank pin 45is correspondingly increased or decreased and the throw of the lower endof link 35, and consequently the throw of link 31 and the travel of thesaw frame C, regulated so that the saw will have a stroke that willutilize its full cutting length regardless of the size of the work. Apump is operated from a crank-arm 71 on rock-shaft 32 by a rod 72, andpumps water or oil` from tank 7 3 through pipes 74 and 75 onto the work.

Having thus fully described my said invention, what I claim as new anddesire to secure by Letters Patent, is:

1. A hack-saw machine comprising a frame, a support for the saweframe, areciprocating saw frame mounted on said Support, a vise for holding thework, means for opening and closing the jaws of said vise, a slottedlink pivoted to an appropriate part of the frame, a pitman connectingthe saw frame with the end of said link opposite its pivot, a slidingblock in the slot of said link, another slotted link one end of which ismounted on a pivot carried by said maag-eat' sliding block and the otherend of which is pivoted to an intermediate vpoint of a threepoint lever,said lever pivotally supported at one end on the frame, a connecting rodextending from the other end of said lever to one of the jaws on thework-holding another sliding lblock in vthe slot of said second link,and an operating shaft with a crank connected with said sliding block4'of said second tlink, substantially asset forth.

2. A hack-saw machine comprising a i frame, a support for the saw frame,said'saw frame mounted on said support, a vibratory link mounted on apivot on an appropriate part of the frame, a pitman connecting theopposite end ofsaid link with the saw frame, a sliding'block mounted ina slot in said link, a second link pivoted at one end to said block andat its other end mounted on an adjustable pivot, said adjustable pivot,means for adjusting saidpivot, a sliding block mounted -in a slotin saidsecond link, and a driving shaft -having a crank 'pivoted to saidsliding block, substantially as' set forth.

3. A hack-saw machine comprising a reciprocating saw frame, a vibratorypart connected to said saw frame, and means for operating said vibratorypart consisting-of an operating shaft, a crank connection thereon, alink mounted to slide on said crank connection and connected at one endto a sliding block in a slot in said vibratory part and at its other endto an adjustable pivot, `said sliding block, said adjustable pivot, andmeans for adjusting the same, substantially as set forth.

4. A hack-saw machine comprising a reciprocating sawframe, a vibratorypart connected therewith for operating the same, and means forcontrolling the vibration of said part and the stroke of said saw frameembodying a link slidably connected at one end with said vibratory part,and at its other end. connected with a movable pivot, said movablepivot, and means for moving fsaid pivot, substantially as set forth.

5. A hack-saw machine comprising a reciprocating saw frame, a vibratorypart connected therewith for operating the same, and means forcontrolling the vibration of said part and the stroke of said saw frameembodying a link slidably connected at one end with said vibratory part,and at its other end connected with a movable pivot, said movable pivot,and means formoving said pivot through the medium of the size of the sawwill be in a downward direction across vise,

the work, and means for regulating the Stroke of said saw embodying anoperating crank shaft, a linkmounted to slide on the kcrank thereof andconnectedat one end to -nected therewith -by a pitman, the connection ofsaid pitman with said swinging part being on a line below ,theconnection with the saw .frame whereby the cutting stroke of said sawwill be in a downward direction across the work, and means forregulating the stroke of said Saw by the size/of the work embodying anoperating shaft, a link operatively connected therewith atv anintermediate lpoint, and at-one end to slide in said swinging part andat its other end to an adjustable pivot, said adjustable pivot, andmeans for adjusting said pivot through the medium of the size ofthework, substantially as set forth.

. 8. A hack-saw machine comprising a reciprocating saw frame, avibratory part mounted on a fixed pivot and connected with the saw frameby a pivot mounted in fixed position relative to the pivot of saidvibratory part, and means for operating said vibratory part embodying anadjustable pivot, a connection from said adjustable pivort to saidvibratorypart, and an operating shaft connected therewith, substantiallyas set forth.

9. Ashack-saw machine comprising a resaid vibratory part, and an'operating shaft for said machine, substantially as set forth.

' 10. A hack-saw machine comprising a frame, a support for the saidframe, said saw-frame mounted to reciprocate on said support, avibratory part operatively connected to said saw frame, anothervibratory part operatively connected to said first mentioned vibratorypart by an adjustable connection, and means for imparting motion to saidsecond vibratory part, substantially as set forth.

11. A hack-saw machine comprising a frame, a pivoted supportfor the sawframe, said saw frame mounted to reciprocate on said pivoted support, avibratory part connected to said saw frame to operate the same at adownward angle in its cutting stroke, a second vibratory partoperatively connected to said first named vibratory part, and means forimparting motion to said second vibratory part, substantially as setforth.

12. A hack-saw machine comprising a machine frame, a pivoted support forthe saw frame, saidl saw frame mounted to reciprocate on said support,an operating shaft, a cam wheel on said operating shaft carrying a crankpin, a connection between said crank pin and said saw frame forreciprocating it, a lever one end of which is in operative contact withsaid cam wheel and the other end of which carries a grip comprising aframe with adjustable jaws, a rod depending/from said pivoted supportand extending through said grip between said aws, and means foroperatively engaging said grip with said depending rod when said frameis tilted and elevated by the cam wheel, substantially as set forth.

13. A hack-saw machine vcomprising a machine frame, a support, a sawframe mounted to reciprocate on said support, vibratory operating links,means for vibrating said links, a pitman connecting said saw frame withone of said vibratory links, a rock-shaft, a strike mounted to have alimited idle tilting movement when turned in one direction and a tiltingmovement to turn l said rock-shaft when the strike is moved in theopposite direction, an adjustable trip on said pitman arranged tooperate against said strike, and an operative connection between saidrock-shaft and the driving mechanism,

whereby when said trip operates said strike in one direction the drivingmechanism will be disengaged, substantially as set forth.

14. A hack-saw machine comprising a reciprocating saw, means foroperating said saw, means for freeing the points of the teeth from thework on its non-cutting stroke comprising a pivoted frame, gripping jawscarried thereby, a bar connected with the saw support and extendingbetween said jaws, a bearing'point carried by said pivoted frame adistance above the gripping jaw on one side thereof, a spring mounted insaid frame above the gripping jaw on the other side and adapted to bearagainst the opposite side of said bar, a lever for tilting said frame tobring said gripping jaws into action against the edges of said bar, anda connection with the operating shaft for actuating said lever on eachreturn movement of the saw frame, substantially as set forth.

15. A hack-sawmachine comprising a reciprocating saw frame, operatingmeans,

and means for connecting said operatingv means to said reciprocating sawframe embodying a set of links pivotally mounted and joined by pivotaland slidable connections, and a connection from said links to said sawframe, substantially as set forth.

16. A hack-saw machine comprising a reciprocating saw, land means foroperating said saw consisting of vibratory links hung on pivots andconnected together by a pivotal connection, and a connecting partrunning from one ofsaid links to said saw, substantially as set forth.

17. A hack-saw machine comprising a reciprocating saw frame, a powershaft, compound links slidably and pivotally connected one carried on anadjustable pivot and the other pivoted to the machine frame and ROBERTc. BERRY. 'I[L.s.]

Witnesses:

E. W. BRADFORD, L. M. PATTERSON.

